Added osgTerrain::Terrain support to the .osg format

src/osgPlugins/osgTerrain/CMakeLists.txt

@@ -8,6 +8,7 @@ SET(TARGET_SRC
     CompositeLayer.cpp
     SwitchLayer.cpp
     Layer.cpp
+    Terrain.cpp
     TerrainTile.cpp
     GeometryTechnique.cpp
     ReaderWriterOsgTerrain.cpp

src/osgPlugins/osgTerrain/Terrain.cpp

@@ -0,0 +1,42 @@
+#include "osgTerrain/Terrain"
+
+#include "osgDB/Registry"
+#include "osgDB/Input"
+#include "osgDB/Output"
+
+// forward declare functions to use later.
+bool Terrain_readLocalData(osg::Object& obj, osgDB::Input& fr);
+bool Terrain_writeLocalData(const osg::Object& obj, osgDB::Output& fw);
+
+// register the read and write functions with the osgDB::Registry.
+REGISTER_DOTOSGWRAPPER(Terrain)
+(
+    new osgTerrain::Terrain,
+    "Terrain",
+    "Object Node Terrain Group",
+    &Terrain_readLocalData,
+    &Terrain_writeLocalData
+);
+
+bool Terrain_readLocalData(osg::Object& obj, osgDB::Input& fr)
+{
+    bool iteratorAdvanced = false;
+
+    osgTerrain::Terrain& terrain = static_cast<osgTerrain::Terrain&>(obj);
+
+    float value;
+    if (fr.read("SampleRatio",value)) terrain.setSampleRatio(value);
+    if (fr.read("VerticalScale",value)) terrain.setVerticalScale(value);
+
+    return iteratorAdvanced;
+}
+
+
+bool Terrain_writeLocalData(const osg::Object& obj, osgDB::Output& fw)
+{
+    const osgTerrain::Terrain& terrain = static_cast<const osgTerrain::Terrain&>(obj);
+    fw.indent()<<"SampleRatio "<<terrain.getSampleRatio()<<std::endl;
+    fw.indent()<<"VerticalScale "<<terrain.getVerticalScale()<<std::endl;
+
+    return true;
+}